Mammoth HydroBank MS, Инструкция по установке, эксплуатации и обслуживанию

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26 HydroBank MS Installation and Operation Manual MAMM-WSHP-IOM-1MSA (October 2014)
Troubleshooting
Troubleshooting
Charts in this section provide general guidelines for
troubleshooting problems with your unit. For additional
help, contact your local Mammoth representative. For
assistance locating your Mammoth representative, visit
www.mammoth-inc.com.
Table 4: Refrigeration System Troubleshooting
Symptom
Head
Pressure
Suction
Pressure
Compressor
Amp Draw
Super Heat Subcooling
Air Temp
Differential
Water
Loop Temp
Differential
Safety Lockout
Undercharged system Low Low Low High Low Low Low Low Pressure
Overcharged system High High or Normal High Normal High Normal Normal High Pressure
Low air flow in cooling Normal Low Low or Normal Low or Normal Normal High Low or Normal Low Temp
Low water flow in cooling High High or Normal High High or Normal Normal Normal or Low High High Pressure
High air flow in cooling
Normal
or Low
High Normal High Low Low Normal
High Pressure or
No Lockout
High water flow in cooling Low Normal Low Normal Normal Normal Low
Low Temp or
No Lockout
TVX restricted High Low Normal or low High High Low Low High Pressure
Table 5: Performance Troubleshooting
Problem Heating Cooling Possible Cause Solution
Insufficient
capacity
X X Dirty air filter Replace or clean.
X X Low refrigerant charge Recover refrigerant and re-charge to nameplate.
Not cooling or
heating properly
X X Reduced or no air flow Check for dirty air filter; clean or replace. Check fan motor operation, airflow restrictions.
X X Low refrigerant charge Recover refrigerant and re-charge to nameplate.
X X Low water flow Adjust to proper water flow rate
X X Leaky duct work Check supply and return air temperatures at the unit and at distant duct registers. If
significantly different, check for duct leaks.
Unit doesn’t
operate in
cooling
X X Low refrigerant charge Recover refrigerant and re-charge to nameplate.
X X Restricted metering device Check superheat and subcooling. Replace metering device.
X Defective reversing valve Perform reversing valve touch test.
X X Thermostat improperly located Check thermostat location and for air drafts behind thermostat.
X X Scaling in waterside heat exchanger Perform scaling check and clean if necessary.
X X Inlet water too hot or cold Check inlet water temperature. Check loop system for proper operation/design.
High head
pressure
X Reduced or no air flow in heating Check for dirty air filter; clean or replace. Check fan motor operation, airflow restrictions.
X Reduced or no water flow in cooling Check pump operation or valve operation/setting. Check water flow; adjust to proper flow rate.
X Inlet water too hot Check inlet water temperature. Check loop system for proper operation/design.
X Air temperature out of range in heating Bring return air temp within design parameters.
X Scaling in waterside heat exchanger Perform scaling check and clean if necessary.
X X Unit overcharged Check superheat and subcooling.
X X Non-condensable in system Vacuum system, reweigh in charge.
Low suction
pressure
X Reduced water flow in heating Check pump operation or valve operation/setting. Check water flow; adjust to proper flow rate.
X Water temperature out of range Bring water temp within design parameters.
X Reduced air flow in cooling Check for dirty air filter; clean or replace. Check fan motor operation, airflow restrictions.
X Air temperature out of range Check for too much cold vent air. Bring entering air temp within design parameters.
X X Low refrigerant charge Recover refrigerant and re-charge to nameplate.
Low discharge
temp in heating
X Too high of air flow Check fan motor speed selection and airflow.
X Dirty air filter restricting air flow to space Replace or clean.